Network Management on the Isles of Scilly
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Network Management on the Isles of Scilly. Ben Godfrey Western Power Distribution Innovation and Low Carbon Networks Engineer 01332 827447/07894258687 [email protected] The Isles of Scilly. 40 km off Lands End 5 inhabited Only these 5 have electricity supplies

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Network Management on the Isles of Scilly

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Network management on the isles of scilly

Network Management on the Isles of Scilly

Ben Godfrey

Western Power Distribution

Innovation and Low Carbon Networks Engineer

01332 827447/07894258687

[email protected]


The isles of scilly

The Isles of Scilly

  • 40 km off Lands End

  • 5 inhabited

  • Only these 5 have electricity supplies

  • Population approximately 2000 people


Electrical network

Electrical Network

Supplies by a 33kV undersea cable from the mainland

11kV submarine cables interconnect and feed the islands

64 substations with a mix of overhead and underground network

Back up diesel generation to secure supplies


Network management project

Network Management Project

LV monitoring has been installed on the 64 substations supplying customers

Smart Meter

Battery

Broadband over Powerline Modem

Rack-mounts for Radios

Main Supply

& Battery Changeover

RCDs

Serial acquisition device

AC/DC Converter

Heater

Main Fuses


Communications backhaul

Communications Backhaul

TCP/IP-based network which uses three technologies:

GE SD4 radios – 400MHz – 19.2kbps

GE Entranetradios – 2.4Ghz – 106kbps

PPC Broadband over Powerline – BPL – 50Mbps

A 150Mbps microwave link connects to the mainland


Typical radio sites

Typical Radio Sites


Typical bpl sites

Typical BPL Sites


Benefits

Benefits

Trending of individual substation in NMS

Metered values stored on a central server

Greater visibility of asset capacity and utilisation

Enables automation roll-out

Comparison of communication systems


Generator installation

Generator Installation

2 x 200kVA peak diesel generators have been installed on both St Agnes and Bryer

FG Wilson P200-2 generators with ComApInteliGen-NT controllers

Remote control and additional automation installed

Star-Star transformers installed to provide HV neutral earth


Proposed scheme

Proposed Scheme

St Agnes – Lower Town

St Mary’s Primary

Gen Controller

33kV

Synch Signal

IoSCommsNetwork

11kV

415V

11kV

Synch Controller

Bryer – The Quay

Gen Controller

Mainland CommsNetwork

Synch Signal

11kV

415V

St Buryan Primary

Synch Controller

33kV

11kV


Key benefits

Key Benefits

Automated blackstartrestoration

Ability to switch over to generator supply and back without short interruptions

Reduce issues with frequency control on a weakly connected network

Allow a larger amount of embedded generation without introducing frequency oscillation issues


Thanks for listening

Thanks for listening

Ben Godfrey

Western Power Distribution

Innovation and Low Carbon Networks Engineer

01332 827447/07894258687

[email protected]


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